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(No Model.) Q I J. 'DONALDSON & G. A. DALLETT.

APPARATUS FOR TRANSMITTING POWER. I No. 361,680. Patented Apr. 26, 1887.

"Milli-1E? "mung m "If-5i flttarney N. PETEZRS. Plmlo-Liulographer. Washington. D. c.

UNITED STATES PATENT Games.

JOHNDONALDSON, or DETROIT, MICHIGAN, AND GEORGE A. DALLETT, or

. PHILADELPHIA, PENNSYLVANIA,ASSIGNORS TO THOMAS H. DALLETT 8t (10., OFPHILADELPHIA, PENNSYLVANIA.

APPARATUS FOR TRANSMITTING POWER.

SPECIFICATION forming part of Letters Patent No. 361,680, dated April 26, 1887.

Application filed February 15, 1887. Serial No. 227,717. (No model.)

To all whom it may concern.-

Be it known that we, JOHN DONALDSON, of Detroit, county of \Vayne, and State of Michigan, and GEORGE A. DALLETT, of Philadelphia, county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Transmitting Power to Machinery; and we declare the following to be afull,clear, and exact description of the 10 invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a part of this specification.

Our invention relates to certain new and 1 useful improvements in apparatus for transmitting power to machinery. The same is more particularly an improvement on a device of this nature for which Letters Patent were granted to William H. Thorne, March 28, 1871, No. 113,113, the special design being to facilitate the engagement of the belt upon the pulleys.

We carry out our invention as follows:

In the drawings, Figure 1 is aside elevation ofa device embodying our invention. Fig. 2 is a separate view of the hanger and idler-pulley frame, showing their orifices in coincidence; Fig. 3, a separate View of the idler-pulley frame with its orifice closed. Fig. 4 is a sepa- 0 rate view of the idler-pulley frame, showing the pulley supported entirely at one side; Fig. 5, a separate view of the tension-weight pulley supported entirely at one side. Fig. '6 is a separate'view of a portion of the hanger with its inclosing-band. Fig. 7 is an elevation at right angles to Fig. 1.

A represents the driving-pulley of any kind of machinery to which power is to be transmitted.

B represents a main drive-pulley, from which power is to be transmitted to the pulley A.

b is its shaft, provided with a transmittingpulley, G.

D is a bracket or hanger supporting an idlerpulley frame, E, which is swiveled therein,

the swiveled end of said frame being hollow to admit the passage of the driving belt or rope. E is the idler-pulley engaged in said latter frame.

F is a tension-weight pulley, and G is the belt or rope engaged upon the pulleys A, E, O, and the tension-weight pulley F. These parts, already described, may be of ordinary construction and operation, except as to the features which we will now proceed to describe.

Heretofore, in order to secure the belt or rope upon the pulley O, and through the sleeve or swiveled portion of the idler-pulley frame, it has been necessary to part the belt to reeve it through said sleeve, and after its engagement over the pulleys to unite its ends by any suitable device-such, for instance, as is ordinarily employed in joining the ends of a railway bell-cord. Various objections have arisen to this parting of the belt and the union of its two ends, and ithas been found desirable to provide means whereby an endless belt may berove through said sleeve and engaged upon the pulleys without the necessity of part ing it, and dispensing with the objectionable union of its ends. This constitutes one of the features of our present invention. To this end the outer end of the hanger, which is orificed to receive the sleeve of the idler-pulley frame, is provided with a slot, (2, and the sleeve swiveled therein is also provided with a corresponding slot, 6, the two slots communicating with each other and with the exterior of the hanger upon the proper adjustment of the idlerpulley frame. It will readily be seen that when said slots d and e are made coincident the belt or rope G may be inserted through said slots into the interior of said sleeve, and thence engaged over the pulley O, the tension-pulley F, back over the pulley E and the pulley A, without any parting of the belt, and doing away with the necessity for any end union.

It may be desirable, also, to close the slot in said sleeve after the insertion of the belt, which we accomplish by engaging therein a corresponding piece of metal, H. We do not limit ourselves to any particular method of se curing this closing-piece of metalin place. It

ormore set-screws,h,holdingitinto engagement with the frame. So, also, it may be desirable may be made T- shaped and held in place by one to close the orifice in said hanger after the engagement of the belt within said sleeve, which we contemplate doingin any proper manneras, for instance, by aband, I, which may be bolted upon the hanger. These parts H and I are thus made removable to admit the engagement and disengagement of the belt within said sleeve.-

The object of our invention, furthermore, has in View the location or engagement of the pulley in the idler-pulley frame, and also the pulley of the tension-weight device in its frame F, in such a way that the belt may be engaged over said pulleys, respectively, without the necessity of removing either of them from their bearings in their respective frames, which would otherwise be necessary on the employment of an endless belt. Accordingly each of the pulleys E and F, respectively, are engaged or supported by a bearing entirely at one side of the pulley, the opposite side being free for the engagement of the belt upon said pulleys, respectively, as shown in Figs. 4 and .5. In these cases the shafts of the respective pulleys are engaged at one end only upon their respective frames.

A s respects the tension-weight device, it is desirable to prevent the liability of the accidental disengagement of the belt from the pulley supported thereon, and yet,where an endless belt is engaged over said pulley, facility must be provided to pass the belt over said pulley without the liability of its being disengaged in a corresponding manner. therefore provide the frame F with guides f f, located adjacent to the flanges of the pulley, so that when the pulley and said guides are adjacent to each other the belt cannot escape therefrom.

Without removing the pulley'from the frame, we deslgn to provide it with a movable engagement in the frame in any proper manner, so that the pulley may be slid back or away from said guides for the engagement of the belt thereon, after which it is to be slid back into engagement with the guides and held in such engagement by any suitable locking device.

We do not limit ourselves to any particular means of accomplishing this movable engagement of the pulley in the frame. As shown in Fig. 5, however, it may be accomplished by constructing the shaft f of the pulley so as to havean eccentric engagement with the frame 1 as related to the pulleyt'. e.', the line of that portion of the shaft engaged in the frame is co centric to the pulley. By this constructionit is evident that the pulley may be rocked or thrown over upon its shaft intothe position shown in dotted lines, Fig. 7, when the belt may be readily engaged thereon. A return movement of the pulley will bring its flanges again adjacent to said guides. A pin, f may then be inserted through the shaft and into the frame to lock the pulley-shaft in that position. The outer end of the shaft may be provided with an orifice, f", also adapted to receive said pin,

lever to throw upward'said pulley.

The operation of the device is evident, the construction of the idler-pulley frame, the hanger, and the tension-pulley device, as

herein described, all combining and uniting to effect the objects herein set forth.

It will be understood, of course, thatthe 'the pin, when'located therein, being used as a sleeve when the idler-pulley frame is engaged in the hanger.

What we claim iss 1. The combination, with a-hanger, D, of the idler-pulley frame sleeved therein, the sleeved portion of said frame and the adjacent portion of the hanger each provided with slots to communicate with the exterior when said slots are brought into said coincidence, substantially as described.

2. The combination, with the hanger D, of an idler-pulley frame sleeved therein, the sleeved portion of said frame and the adjacent portion of said hanger provided with slots communicating with the exterior when said slots are brought into coincidence, saidhanger and idler-pulley frame provided, respectively, with removable strips or bands closing said slots, respectively, substantially as described.

3. The combination, with the idler-pulley frame provided with a hollow sleeve at one end, of a pulley supported entirely upon one side upon said frame, said sleeve constructed with a slot, d, the construction being such that an endless belt may be engaged through said slot within said sleeve and over said pulley without removing the pulley from the frame,

substantially as described.

4. The combination, with a hanger, of an idler-pulley frame constructed with a hollow sleeve swiveled in said hanger, said hanger and sleeve each provided with slots forming communication from the exterior of the hanger to the interior of the sleeve, and in connection therewith a pulley supported entirely at one side upon said frame, the construction being such that an endless belt may be engaged through said slots into the interior of said sleeve and over said pulley without its removal from the frame, substantially as de scribed.

5. The combination, with the frame of the tension-weight, of a pulley supported entirely at one side upon said frame, said frame provided with guides to prevent the disengagement of the belt from the pulley, theshaft of said pulley engaged in said frame in an eccentric 'relation to said pulley, substantially as In testimony whereof we sign this specificamv described. tion in the presence of two witnesses.

6. The combination, with a pulley-frame, of a pulley having a movable engagement in said JOHN DONALDSON. 5 frame, said frame provided with guides to pre- GEORGE A. DALLETT.

vent the disengagement of the belt from the pulley, and locking mechanism to hold said Witnesses.

pulley adjacent to said guides, substantially N. S. \VRIGHT,

as described. M. B. ODOGHERTY. 

